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    • 1. 发明授权
    • Copper foil for printed circuits and process for producing the same
    • 印刷电路用铜箔及其制造方法
    • US5366814A
    • 1994-11-22
    • US153327
    • 1993-11-16
    • Keisuke YamanishiHideo OshimaKazuhiko Sakaguchi
    • Keisuke YamanishiHideo OshimaKazuhiko Sakaguchi
    • C25D7/06C25F3/02H05K1/09H05K3/38B32B15/20
    • H05K3/384H05K2201/0355H05K2203/0307H05K2203/0723Y10S428/935Y10T428/12438Y10T428/12472Y10T428/1291Y10T428/12993
    • A copper foil for printed circuits has a roughened layer formed on the side of the foil to be bonded to a base, the roughened layer consisting of a number of protuberant copper electrodeposits containing chromium tungsten or both. It may also have a copper plating layer covering the roughened layer and a treatment layer covering the copper plating layer and formed of either a metal selected from the group consisting of copper, chromium, nickel, iron, cobalt, and zinc, or an alloy of two or more such metals. When necessary, the copper foil may contain an anticorrosive layer including various chromate treated layers further formed on the treatment layer. The copper foil is produced by electrolyzing a raw foil as a cathode in an acidic copper electrolytic bath at a current density close to the critical density, thereby forming the roughened layer, the electrolytic bath containing 0.001-5 g/l of chromium ion tungsten ion or both. The roughened layer is electrolytically overcoated with the treatment layer following the formation of a copper plating layer, which, when necessary, is anti-corrosively treated.
    • 用于印刷电路的铜箔具有形成在箔的与基底结合的一侧上的粗糙层,该粗糙层由许多包含铬钨或两者的突出铜电沉积物组成。 还可以具有覆盖粗糙层的铜镀层和覆盖铜镀层的处理层,并且由选自铜,铬,镍,铁,钴和锌的金属形成,或者由 两种或更多种这样的金属。 必要时,铜箔可以含有在处理层上进一步形成的各种铬酸盐处理层的防腐层。 铜箔通过在酸性铜电解槽中以接近临界密度的电流密度电解原料箔作为阴极,由此形成粗糙层,电解槽含有0.001-5g / l的铬离子钨离子 或两者。 在形成镀铜层之后,用处理层对粗化层进行电解过涂层,当需要时,其被抗腐蚀处理。
    • 2. 发明授权
    • Apparatus and method for generating high speed dubbing signal
    • 用于产生高速转录信号的装置和方法
    • US5414566A
    • 1995-05-09
    • US186888
    • 1994-01-26
    • Yoshinobu ObaHideo OshimaToshihiro Uehara
    • Yoshinobu ObaHideo OshimaToshihiro Uehara
    • G11B5/86G11B27/032G11B27/036H04N9/79H04N9/797H04N9/802G11B27/02G11B5/00G11B5/09
    • H04N9/79G11B27/032G11B27/036G11B5/86H04N9/797H04N9/802G11B2220/90
    • An apparatus for generating a high speed dubbing signal to be recorded by an external recording apparatus. The high speed dubbing signal, whose pitch is N times that of a digital input signal, is generated as follows. An encoding circuit subsamples the digital input signal consisting of frame signals each of which consists of N field signals, so that each frame signal is compressed by a factor of N to be contained in one field interval. A digital signal recording and reproducing circuit including a recording and reproduction system, records on a tape, at a normal tape speed and at a normal head drum rotational frequency, the compressed signal in such a manner that each field including the compressed signal appears once per frame interval, and then selectively reproduces from the tape the field including the compressed signal at a tape speed N times the normal speed and at the normal drum speed. A decoding circuit interpolates the output signal of the recording and reproducing portion to recover the lost information by the subsampling. An output portion produces the high speed dubbing signal based on the output of the decoding circuit. Since the drum rotational frequency is maintained at the normal value throughout the recording and reproduction procedure by the recording and reproduction system, the contact between the tape and head of the system is stabilized, thereby enabling reliable high speed dubbing.
    • 一种用于产生由外部记录装置记录的高速转录信号的装置。 如下产生其间距为数字输入信号的N倍的高速复录信号。 编码电路对由每个由N个场信号组成的帧信号组成的数字输入信号进行子采样,使得每个帧信号被压缩N个因子以包含在一个场间隔中。 一种包括记录和再现系统的数字信号记录和再现电路,以一般的磁带速度和正常磁鼓转动频率在磁带上记录压缩信号,使得包括压缩信号的每个场出现一次 帧间隔,然后从磁带选择性地以磁带速度N倍正常速度和正常鼓速度再现包括压缩信号的场。 解码电路内插记录和再现部分的输出信号,以通过子采样来恢复丢失的信息。 输出部分基于解码电路的输出产生高速转录信号。 由于通过记录和再现系统在整个记录和再现过程中滚筒旋转频率保持在正常值,所以系统的磁头和磁头之间的接触是稳定的,从而实现可靠的高速配音。